The DNS Query Log feature is a great feature, but it needs some serious improvements for search functionality.
Users should be able to search by LAN IP (to search for specific client queries based on DNS relay server passing LAN IP's to DNSFilter), local IP (i.e., site WAN IP to see what queries were sent over what WAN interface for things like seeing when failover WAN is used), etc.
Hopefully DNSFilter can improve this soon. I'm surprised it's not been expanded yet. DNS Query Log is a great feature, and this would really make it a lot better.